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  <div class="headertitle"><div class="title">stm32h7xx_hal_dma_ex.c File Reference</div></div>
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<p>DMA Extension HAL module driver This file provides firmware functions to manage the following functionalities of the DMA Extension peripheral:  
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &quot;<a class="el" href="stm32h7xx__hal_8h_source.html">stm32h7xx_hal.h</a>&quot;</code><br />
</div><a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
<div class="textblock"><p>DMA Extension HAL module driver This file provides firmware functions to manage the following functionalities of the DMA Extension peripheral: </p>
<dl class="section author"><dt>Author</dt><dd>MCD Application Team<ul>
<li>Extended features functions</li>
</ul>
</dd></dl>
<pre class="fragment">==============================================================================
                      ##### How to use this driver #####
==============================================================================
[..]
The DMA Extension HAL driver can be used as follows:
 (+) Start a multi buffer transfer using the HAL_DMA_MultiBufferStart() function
     for polling mode or HAL_DMA_MultiBufferStart_IT() for interrupt mode.

 (+) Configure the DMA_MUX Synchronization Block using HAL_DMAEx_ConfigMuxSync function.
 (+) Configure the DMA_MUX Request Generator Block using HAL_DMAEx_ConfigMuxRequestGenerator function.
     Functions HAL_DMAEx_EnableMuxRequestGenerator and HAL_DMAEx_DisableMuxRequestGenerator can then be used
     to respectively enable/disable the request generator.

 (+) To handle the DMAMUX Interrupts, the function  HAL_DMAEx_MUX_IRQHandler should be called from
     the DMAMUX IRQ handler i.e DMAMUX1_OVR_IRQHandler or DMAMUX2_OVR_IRQHandler .
     As only one interrupt line is available for all DMAMUX channels and request generators , HAL_DMA_MUX_IRQHandler should be
     called with, as parameter, the appropriate DMA handle as many as used DMAs in the user project
    (exception done if a given DMA is not using the DMAMUX SYNC block neither a request generator)

   -@-  In Memory-to-Memory transfer mode, Multi (Double) Buffer mode is not allowed.
   -@-  When Multi (Double) Buffer mode is enabled, the transfer is circular by default.
   -@-  In Multi (Double) buffer mode, it is possible to update the base address for
        the AHB memory port on the fly (DMA_SxM0AR or DMA_SxM1AR) when the stream is enabled.
   -@-  Multi (Double) buffer mode is possible with DMA and BDMA instances.
</pre><dl class="section attention"><dt>Attention</dt><dd></dd></dl>
<p>Copyright (c) 2017 STMicroelectronics. All rights reserved.</p>
<p>This software is licensed under terms that can be found in the LICENSE file in the root directory of this software component. If no LICENSE file comes with this software, it is provided AS-IS. </p>
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